OBJETIVOS: o presente estudo pretendeu investigar se o padrão facial acarreta implicações no desempenho das funções de respiração, mastigação, deglutição e fala em indivíduos com má oclusão Classe III esquelética. METODOLOGIA: analisaram-se os dados da avaliação de 40 pacientes adultos com má oclusão Classe III, sendo 25 dolicocefálicos e 15 mesocefálicos. Consideraram-se aspectos relacionados à postura habitual de lábios e língua, modo respiratório, tipo mastigatório, padrão de deglutição e fala. RESULTADOS: a postura alterada de lábios foi significantemente maior para o grupo de dolicocefálicos, enquanto a postura de língua no assoalho da boca foi predominante em ambos os grupos. Quanto ao modo respiratório, verificou-se que o modo oral ou oro-nasal foi significantemente maior para o grupo de dolicocefálicos. A mastigação mostrou-se alterada para ambos os grupos, enquanto a interposição de língua durante a deglutição predominou no grupo mesocefálico e a anteriorização de língua na fala no dolicocefálico. A interposição de língua na deglutição mostrou-se relacionada com a ocorrência de anteriorização de língua na fala. CONCLUSÕES: o tipo dolicocefálico contribui para a ocorrência de alterações na postura habitual dos lábios, bem como nas funções de respiração e fala, enquanto o tipo mesocefálico influenciou as características de deglutição de indivíduos com má oclusão Classe III esquelética.

No abstract

Dental arches areas with teeth presenting dentoalveolar ankylosis and replacement root resorption can be considered as presenting normal bone, in full physiological remodeling process; and osseointegrated implants can be successfully placed. Bone remodeling will promote osseointegration, regardless of presenting ankylosis and/or replacement root resorption. After 1 to 10 years, all dental tissues will have been replaced by bone. The site, angulation and ideal positioning in the space to place the implant should be dictated exclusively by the clinical convenience, associated with previous planning. One of the advantages of decoronation followed by dental implants placement in ankylosed teeth with replacement resorption is the maintenance of bone volume in the region, both vertical and horizontal. If possible, the buccal part of the root, even if thin, should be preserved in the preparation of the cavity for the implant, as this will maintain gingival tissues looking fully normal for long periods. In the selection of cases for decoronation, the absence of microbial contamination in the region - represented by chronic periapical lesions, presence of fistula, old unconsolidated root fractures and active advanced periodontal disease - is important. Such situations are contraindications to decoronation. However, the occurrence of dentoalveolar ankylosis and replacement resorption without contamination should neither change the planning for implant installation, nor the criteria for choosing the type and brand of dental implant to be used. Failure to decoronate and use dental implants has never been reported.

Zirconia drills presented more regular surfaces whereas stainless steel drills revealed more severe signs of wear. Further studies must be performed to evaluate the putative influence of these findings in heat generation.

No abstract

The purpose of this paper was to analyze specimens of autogenous bone block grafts exposed to the oral cavity after ridge reconstructions. Specimens of chronic suppurative osteomyelitis (CSO) of the jaws were used as comparison for bacterial colonization pattern. For this, 5 specimens of infected autogenous bone grafts were used and 10 specimens of CSO embedded in paraffin were stained with Brown and Brenn technique and analyzed under light microscopy. The results showed a similar colonization pattern in both situations, with the establishment of bacterial biofilm and the predominance of Gram-positive bacteria. The conclusion was that the similarity in bacterial distribution and colonization between autogenous bone grafts and CSO stresses the necessity of more invasive procedures for the treatment of the autogenous bone grafts early exposed to the oral cavity.

Introduction:Sports’ practitioners are vulnerable to dental trauma; if this occurs, the emergency treatment should be fast and efficient. This may be performed by any person at the site of the accident, not only by dental professionals. Physical educators may face dental trauma and should be able to provide proper care. This study had the objective evaluated the knowledge of physical education graduates on dental trauma.Materials and Methods:A questionnaire containing questions on dental trauma was applied to 199 physical education students; after collection of the questionnaires, data were tabulated and processed on the software Epi Info 2000 (Centers for Disease Control and Prevention, 1600 Clifton Rd., Atlanta, GA 30333, USA). As a result, only 36.7% of participants would take the individual suffering trauma to the dental professional, 56.8% believe that the avulsed tooth should be replanted, and 42.2% would replant it. Only 7.5% would store the avulsed tooth in an ideal storage medium for transportation.Conclusion:It was concluded that there is a lack of knowledge on dental trauma among physical education graduates, evidencing the need of public policies to allow education on this issue.

A retained tooth is when, after normal eruption, is still covered by bone and/or soft tissue. 1 This can occur due to: early loss of deciduous teeth, dental anomalies, poor positioning of the dental germ or of adjacent teeth, lack of space for eruption, permanence of deciduous teeth, trauma, impacted hard, soft, or both tissues, supernumerary teeth, odontogenic cysts, and/or tumors. 2,3 Verri et al 4 indicated that lower third molars are the teeth that most remain impacted, followed by upper third molars, upper canines, and supernumerary teeth. These data were confirmed by other authors. 1,2Retained third molars can be classified according to the angle of the third molars' long axis compared with the adjacent second molars. 5 The vertical position is the most common, followed by mesial or mesioangulated, 6-8 but van der Linden et al 9 and Farish and Bouloux 10 ensured that the mesioangulated lower third molars are the most common position, followed by the vertical.According to Torres et al,7 in the Pell and Gregory 11 classification, the most common position for retained lower third molars is IIB (the space between the ascending and distal ramus of the second molar is smaller than the mesialdistal diameter of the lower third molar, and the highest position of the retained tooth is below the occlusal plane and above the cervical line of the lower second molar), which were the same data uncovered by Nery et al. 12 The presence of these teeth is related to complications such as caries, radicular resorption of adjacent teeth, pericoronaritis, local pain, cyst, or tumor alterations, 10,13,14 and may also increase two 15,16 to three 17,18 times the risk of mandible angle fractures in patients submitted to mandibular trauma, as such a situation makes this region more fragile. 19,20 Keywords ► third molar ► impacted mandible third molar ► mandibular fractures ► angle fracture ► fracture healing AbstractThe objective of this study is to discuss problems associated with dental retention through three clinical cases of mandible fractures related to the presence of retained lower third molars, emphasizing the possibility of mandible fractures resulting from this or from the extraction procedure. The three evaluated patients had a fracture in the mandible angle. The third molars were present in all the cases, as was the relationship of the fracture with the teeth. After evaluating the three cases and reviewing literature, it is believed that the presence of the retained lower third molars and the surgical procedures for their extraction increase the risk of mandible angle fractures.